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Sorrry guys ive been out of the loop on this. the engine is running great for the last two seasons. what i found with the low vacuum was the cam timing I spent a bit of time moving it around. after installing a comp cams timing chain and installing it at 108 icl (the cam card wants 109 but this is as close as i could get it) my vacuum reading was about 12-13 inches at idle which is acceptable, you will get an engine code at about 10 inches. retarding the cam from this point 4 degrees i had a 2 inch loss in vacuum at idle and had 2 inch loss in vacuum at idle when i advanced the cam 4 degrees so my best vacuum reading was at 108 icl which is where it is sitting today and is basically where the cam card wants it . Now that the motor is totally broken in the vacuum is a solid 13 inches at 650 rpm. I will complete my reversion issues on my other thread i hope this helps any of you out there.